Knife



H. L. ROSS Nov. 8, 1932.

KNIFE Filed June 30, 1931 FIG. I.

FIG. 2.

FlG.3.

INVENTOR.

ATTORNEYS.

m L T m B .R Y B bent back Patented Nov. 8, 1932 UNITED STATES PATENT GFFICE' HERBERT L. ROSS, OF OAKLAND, CALIF ORN IA KNIFE Application filed June 30,

In this specification and the accompanying drawings the invention is disclosed in its preferred form. It is to be understood, however, that it is not limited to this form because 1t may be embodied in other forms within the purview of the claims following the description.

In the one sheet of drawings:

Fig. 1 is a side elevation of a knife constructed in accordance with this invention.

Fig. 2 is a longitudinal section of the same taken on the line IIII, Fig.1.

Fig. 3 is a detached detail view in tudinal section of the blade holder.

I11 detail the construction illustrated in the drawings comprises the blade holder prefer ably composed of a single strip of sheet metal such as steel, hard brass, or the like. It is upon itself at 1 to form the parallel sides 23, substantially as shown in Fig. 3.

The side 2 is perforated at 45, to register with the tits 67 struck up from the body of the side through the perforations in the conventional two-edged razor blade X of the Gillette t pe.

The ends of the holder sides 2-3 may be varied in any suitable manner to grip other forms of wafer blades, now available, some of which have end notches, and other distinguishing perforations, like the Valet and others. It is within the ability of any skilled mechanic to adapt the present invention to various forms of blades. The ends of the holder are beveled as at 8, Fig. 1, to expose aboutone half the length and width of the blade X for cutting purposes. The end of the side 2 is flanged over at 9, to enclose the end 10 of the side 3 and the end of the longi- 3. These tits are arranged to pass 1931. Serial No. 547,925.

blade X to take the thrust when the cutting edgell is used, working in conjunction with the tits 6-7 toaline the blade X andhold it rigidly when in use.

WVith the blade in place the sides 23 of the holder are compressed together and inserted into the end of the sheath-handle.

This handle comprises a single strip ofsheet metal folded back mediate its width the front composed of the margins 15-16 adjacent the edges 1718. The bends at 1213 should be of suilicient radius to give a comupon itself at 12-13 interto form the back 14 and i fortable bead, such as at 1, forthe hand of the operator.

be knurled to insure a good frictional hold in manipulating the knife.

The margins 15-16 are cut awayin any suitable pattern to form the resilient detents 19+1-9, 2020, properly shaped to frictionally engage the tits 6-7. In the operative po sition as in Fig; 1, the holder is pushed through the handle until the tit 6 engages the These edges 12-48 and 1 may i detents- 20-20 which effectively lock the blade in cutting position. The sheath the blade the endflange- 9 can be tapped on a counter or pushed against any surface, to overcome the resilient resistance of the detents 20-20, which will retreat to a similar frictional engagement with the detents 19 19, which holds the blade in the retracted position telescoped within the sheath-handle.

The blade may be advanced to the operative position by similarly tapping the end 1 of the holder, or the blade holder may be advanced or retracted by. firmly grasping the handle in one hand and pushing or pulling the blade holder with the other. For a better j 90 grip upon'the holder at 1,,the margins l516 are cut away at 21-21 to expose more gripping surface on the holder. The holder has the hole 22 for convenience in hanging up the knife or attaching it to a key chain.

In its present proportions, approximately full size, the knife is especially adaptable for opening fiber board packing cases and other rough work. Smaller sizes can be made by shortening the handle, for ordinary work.

The blades may be reversed or replaced in permit the tit 6 to an obvious manner. If the larger radius is reduced to a simple fold at 1, that end may be inserted into the front end of the sheath in assembling the device.

The detents 1920 could be dispensed with and the holder held firmly within the sheathhandle by the frictional clamping action of the margins 15-16 which are resilient at the folds 12-13. The end 1 will prevent the holder pulling out of the handle when in use, see Fig. 1.

Having thus described this invention what is claimed and desired to secure by Letters Patent is:

1. A knife including a sheath composed of a strip of sheet material folded back upon itself with two of its edges in proximity and provided with resilient detents, a blade holder slidable in said sheath and composed of a piece of sheet material folded back upon itself, a tit on one of the sides of said holder projecting through holes in the opposite side and engageable with said detents, and a blade in said holder engaging said tit.

52. A knife including a handle composed of a strip of sheet material folded back upon itself with two of its edges in proximity and forming a sheath, resilient detents formed in the adjacent edges of said folded-over sheath handle, a blade holder slidable in said sheath and composed of a piece of sheet material folded back upon itself forming a transverse resilient hinge, a tit on one of the sides of said holder projecting through a hole on the opposite side and adapted to engage said detents, and a blade between the two sides of said holder and engaging said tit.

3. A knife including a sheath provided with resilient detents, a blade holder slidable in said sheath and composed of a piece of sheet material folded back upon itself forming a transverse resilient hinge, a tit on said holder engageable with said detents, a blade in said holder and engaging said tit, and a depending flange on the end of one of the sides of said holder opposite said resilient hinge and adapted to engage and aline said blade.

i. A knife including a sheath provided with resilient detents, a blade holder slidable in said sheath and composed of a strip of sheet metal folded back upon itself forming a transverse resilient hinge, a tit on said holder engageable with said detents, and a blade between the folded over portions of said holder and engaging said tit.

In testimony whereof I have hereunto set my hand this 25th day of June, 1931.

HERBERT L. ROSS. 

